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Enjoy your music even more

Go ahead, circle the parking lot till your favorite song is over. Polk Audio's DXi Series subs will make you want to hit "repeat" so you can hear it all over again. Polk uses a high-tech approach and ideal materials to create subs that will add serious impact to your tunes.

Exacting standards — precise engineering where it counts

The DXi 1240DVC 12" sub features a stiff polymer composite cone and sturdy large roll butyl rubber surround, so you can ride the bass wave for years to come. Engineers at Polk analyze drivers in motion to ensure that cone movement is even and precise, so you'll get impressive thump with minimal distortion. Polk also uses laser imaging to craft woofer cones that are perfectly balanced to resist distortion-causing resonances.

The dual 4-ohm voice coils allow you to wire your system to draw maximum power from your mono amp or to hook up multiple subs safely. Pair this sub with the right amp and enclosure, then strap yourself in for a serious low-frequency ride.

To drive this single subwoofer, we recommend a mono amplifier rated between 270 and 540 watts RMS at 2 ohms. For more information, please refer to our article on How to Match Subwoofers and Amplifiers.

What's a component sub and why would I want one?

A component sub is simply a speaker that's designed to reproduce bass once it's installed in a compatible enclosure. Think about the impact of a movie soundtrack in a big theater or even in your own home HDTV setup. A component sub can add the same kind of power to the music in your car. And a car sub is not all about the boom that you hear on a street corner (although that's cool too) - you can pair a component sub with your choice of enclosure to get bass just the way you like it, from tight and punchy to fat and loose. And once you experience music in your car with a well-tuned subwoofer, you'll never go back.

Product Research

Features

Dual 4Ω Voice Coils: This woofer features dual 4Ω
voice coils, offering wiring flexibility. When the voice coils are wired in
parallel, the woofer presents a 2Ω load. When the voice coils are wired
in series, the woofer presents an 8Ω load.

Polypropylene Cone: The DXi series subs use a durable
polypropylene cone. The cone is both lightweight and rigid, and will withstand
the harsh automobile environment.

Klippel Optimized: For a driver to reproduce complex sounds
accurately, the cone must move exactly the same distance and manner in both
directions. The Klippel distortion analyzer, a device that uses a laser and
sophisticated software to do large-scale analysis of drivers in motion, lets
Polk optimize the speaker's motor structure, voice coil alignment, and suspension
to yield the best possible performance.

Break-In Period: Subwoofers will achieve optimal performance
once they are thoroughly broken-in. To break in a new DXi sub play music through
it for 20 to 30 hours at moderate levels.

Enclosure Compatibility

Sealed Box Volume: Polk recommends mounting this woofer in a
sealed enclosure with an internal volume of 0.88 cubic feet.

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team. They verify what’s in the box, check the owner's manual, and record
dimensions, features and specs. We stay on top of new products and technologies
to help people make informed choices.

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Blew out in a week

Written By Pv2 Ballin, Spring, Texas on Saturday, May 31, 2014

"Coolness Factor"

Build Quality

Ease of Use

Sound Quality

Value

Ok so I bought this subwoofer at a big box store, and when It was installed it was amazing and I only kept it at 1/3 power, and a week later it stoped working while I was driving so I pulled over at a gas station and looked at my box and smoke was coming out of it and my subs were blown

Amazing Sub

Written By Ashlo1138, Austin, TX on Thursday, February 20, 2014

"Coolness Factor"

Build Quality

Ease of Use

Sound Quality

Value

I haven't had a single problem with this sub. I first built a .88 cuft sealed box, and it sounded really good, but the seal wasn't perfect. so when i rebuilt the box i built a ported box to polks specifications, and without changing the amp settings at all it went a good sub to a superb sub. It's loud, its precise, it can hit harder than a bruce lee, and just as fast. I keep it toned down most of the time, but when some "cool" kid rolls up next to me with his sloppy bass, i grab the remote and show him how its done.

Pros:Big, Fast, Precise, Good price, I'm not an audio expert, so i couldn't really ask for more.

Cons:It's big. and needs a big ported box. but hey, that's not really a con, now is it?

Polk Audio DXi1240DVC

Dust cover, low end and top mount depth reduction are an improvement over the previous DXI version. I was interested in SQL and placed mine in a .88cu ft sealed enclosure as recommended by both Crutchfield and my manual. Don't bother asking either Polk or Crutchfield for the actual displacement of the driver as neither had the answer. My DXI is powered by an Infinity 1300a Mono amp at a 2ohm load both of which are residing in the trunk of my WRX sedan. Sounds great and hits with authority.

Pros:Price, lower top mount depth, sound quality,

Cons:No binding posts but this is minor since I solder all my speaker connections

Bad News

I hope I received the one bad one in the group. I had the sub installed for three days before it blew up. On the day it fried itself, the radio was only playing for 10 minutes. It never sounded right from the start. I had to have my Alpine up to 15 out of 30 before I could even hear it and then it stopped going up in loudness between 23-25 that was the first sigh of trouble. I have had to send back stuff before and never had a problem so it was not a risk. Better luck next time. I am not sure if I am goin for an exchange or a new product????

Pros:The sound was rich and firm. A better sound than I thought I was going to get for the price